Spectro-electrochemical characterization and quantification of Rutin in aqueous media.

From UV-Vis spectrophotometric measurements the acidity constants of Rutin in aqueous media, at 25 °C and 0.1 M ionic strength, were determined as: pK1 = 4.392 ±â€¯0.167, pK2 = 7.130 ±â€¯0.050, pK3 = 8.661 ±â€¯0.042 and pK4 = 12.354 ±â€¯0.020 and the molar absorptivity coefficients of all the Rutin pH-dependent species were reported as a function of wavelength. Furthermore, the electrochemical behavior of Rutin at neutral pH was investigated using a bare carbon paste electrode, CPE. It was found that both: Rutin electrochemical oxidation and reduction are reversible, adsorption-controlled processes, involving 2 electron transfers. Moreover, the bare CPE was used for the electrochemical quantification of Rutin in neutral aqueous media, displaying the following features: (1.078 ±â€¯0.440) µM, (3.594 ±â€¯0.400) µM and (0.308 ±â€¯0.014) µA µM-1 for the detection and quantification limits and sensitivity, respectively, within the 1-11 µM linear range. Meanwhile the spectrophotometric method displayed the following analytical features: (3.385 ±â€¯1.318) µM, (11.283 ±â€¯3.114) µM and (0.0120 ±â€¯0.0001) AU µM-1 for the detection and quantification limits and sensitivity, respectively within the 11-110 µM linear range. In like manner, the bare CPE is also shown as a robust electrochemical sensor that allows Rutin quantification even in the presence of ascorbic acid, commonly found in Rutin samples.

El modelo EFQM, análisis de los criterios resultados en un servicio deportivo municipal con más de 25.000 habitantes / The EFQM model an analysis of the criteria results in a Municipal Sports Service covening an area of over 25.000 people

El objetivo de este trabajo es aplicar la autoevaluación, del Modelo EFQM de Excelencia, a un Servicio Deportivo Municipal de un ayuntamiento con más de 25000 habitantes de la Región de Murcia, tiene 41 trabajadores (clientes internos), 24 (58.54%) hombres y 17 (41.46%) mujeres. Los resultados permiten una visión de los alcances obtenidos por este servicio deportivo en su camino hacia la excelencia. Para la validez de constructo se utilizó el análisis factorial confirmatorio con el programa, LISREL, versión (..) (AU)

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Primer caso de síndrome de Rapunzel en Cuba / First case of Rapunzel syndrome in Cuba

El síndrome de Rapunzel es una infrecuente forma de presentación del tricobezoar. Se comunica el primer caso de este síndrome en Cuba y el número 15 descrito en la literatura. Se aporta material gráfico que ilustra la presentación (AU)